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android 翻页效果示例源码下载

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  • 开发语言:Java
  • 实例大小:0.73M
  • 下载次数:14
  • 浏览次数:214
  • 发布时间:2014-04-15
  • 实例类别:Android平台开发
  • 发 布 人:西北狼007
  • 文件格式:.zip
  • 所需积分:2
 相关标签: Android 翻页

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【核心代码】

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package sf.hmg.turntest;
 
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PointF;
import android.graphics.Region;
import android.graphics.drawable.GradientDrawable;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
 
public class PageWidget extends View {
 
    private static final String TAG = "hmg";
    private int mWidth = 480;
    private int mHeight = 800;
    private int mCornerX = 0; // 拖拽点对应的页脚
    private int mCornerY = 0;
    private Path mPath0;
    private Path mPath1;
    Bitmap mCurPageBitmap = null; // 当前页
    Bitmap mCurPageBackBitmap = null;
    Bitmap mNextPageBitmap = null;
 
    PointF mTouch = new PointF(); // 拖拽点
    PointF mBezierStart1 = new PointF(); // 贝塞尔曲线起始点
    PointF mBezierControl1 = new PointF(); // 贝塞尔曲线控制点
    PointF mBeziervertex1 = new PointF(); // 贝塞尔曲线顶点
    PointF mBezierEnd1 = new PointF(); // 贝塞尔曲线结束点
 
    PointF mBezierStart2 = new PointF(); // 另一条贝塞尔曲线
    PointF mBezierControl2 = new PointF();
    PointF mBeziervertex2 = new PointF();
    PointF mBezierEnd2 = new PointF();
 
    float mMiddleX;
    float mMiddleY;
    float mDegrees;
    float mTouchToCornerDis;
    ColorMatrixColorFilter mColorMatrixFilter;
    Matrix mMatrix;
    float[] mMatrixArray = { 0, 0, 0, 0, 0, 0, 0, 0, 1.0f };
 
    boolean mIsRTandLB; // 是否属于右上左下
    // for test
    float mMaxLength = (float) Math.hypot(480, 800);
    int[] mBackShadowColors;
    int[] mFrontShadowColors;
    GradientDrawable mBackShadowDrawableLR;
    GradientDrawable mBackShadowDrawableRL;
    GradientDrawable mFolderShadowDrawableLR;
    GradientDrawable mFolderShadowDrawableRL;
 
    GradientDrawable mFrontShadowDrawableHBT;
    GradientDrawable mFrontShadowDrawableHTB;
    GradientDrawable mFrontShadowDrawableVLR;
    GradientDrawable mFrontShadowDrawableVRL;
 
    private Bitmap mBitmap;
    private Canvas mCanvas;
    private Paint mBitmapPaint;
    Paint paint;
 
    Paint mPaint;
 
    public PageWidget(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
        mPath0 = new Path();
        mPath1 = new Path();
        createDrawable();
 
        // ---------------------------------------
        mBitmap = Bitmap.createBitmap(480, 800, Bitmap.Config.ARGB_8888);
 
        mCanvas = new Canvas(mBitmap);
        mBitmapPaint = new Paint(Paint.DITHER_FLAG);
 
        paint = new Paint();
        mPaint = new Paint();
        mPaint.setStyle(Paint.Style.FILL);
 
        mCurPageBitmap = BitmapFactory.decodeResource(this.getResources(),
                R.drawable.page1);
        mNextPageBitmap = BitmapFactory.decodeResource(this.getResources(),
                R.drawable.page2);
 
        ColorMatrix cm = new ColorMatrix();
        float array[] = { 0.55f, 0, 0, 0, 80.0f, 0, 0.55f, 0, 0, 80.0f, 0, 0,
                0.55f, 0, 80.0f, 0, 0, 0, 0.2f, 0 };
        cm.set(array);
        mColorMatrixFilter = new ColorMatrixColorFilter(cm);
 
        mMatrix = new Matrix();
    }
 
    /**
     * Author : hmg25 Version: 1.0 Description : 计算拖拽点对应的拖拽脚
     */
    private void calcCornerXY(float x, float y) {
        if (x <= mWidth / 2)
            mCornerX = 0;
        else
            mCornerX = mWidth;
        if (y <= mHeight / 2)
            mCornerY = 0;
        else
            mCornerY = mHeight;
        if ((mCornerX == 0 && mCornerY == mHeight)
                || (mCornerX == mWidth && mCornerY == 0))
            mIsRTandLB = true;
        else
            mIsRTandLB = false;
    }
 
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // TODO Auto-generated method stub
        if (event.getAction() == MotionEvent.ACTION_MOVE) {
            mCanvas.drawColor(0xFFAAAAAA);
            mTouch.x = event.getX();
            mTouch.y = event.getY();
            this.postInvalidate();
        }
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            mCanvas.drawColor(0xFFAAAAAA);
            mTouch.x = event.getX();
            mTouch.y = event.getY();
            calcCornerXY(mTouch.x, mTouch.y);
            this.postInvalidate();
        }
        if (event.getAction() == MotionEvent.ACTION_UP) {
            mCanvas.drawColor(0xFFAAAAAA);
            mTouch.x = mCornerX;
            mTouch.y = mCornerY;
            this.postInvalidate();
        }
        // return super.onTouchEvent(event);
        return true;
    }
 
    /**
     * Author : hmg25 Version: 1.0 Description : 求解直线P1P2和直线P3P4的交点坐标
     */
    public PointF getCross(PointF P1, PointF P2, PointF P3, PointF P4) {
        PointF CrossP = new PointF();
        // 二元函数通式: y=ax b
        float a1 = (P2.y - P1.y) / (P2.x - P1.x);
        float b1 = ((P1.x * P2.y) - (P2.x * P1.y)) / (P1.x - P2.x);
 
        float a2 = (P4.y - P3.y) / (P4.x - P3.x);
        float b2 = ((P3.x * P4.y) - (P4.x * P3.y)) / (P3.x - P4.x);
        CrossP.x = (b2 - b1) / (a1 - a2);
        CrossP.y = a1 * CrossP.x   b1;
        return CrossP;
    }
 
    private void calcPoints() {
        mMiddleX = (mTouch.x   mCornerX) / 2;
        mMiddleY = (mTouch.y   mCornerY) / 2;
        mBezierControl1.x = mMiddleX - (mCornerY - mMiddleY)
                * (mCornerY - mMiddleY) / (mCornerX - mMiddleX);
        mBezierControl1.y = mCornerY;
        mBezierControl2.x = mCornerX;
        mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX)
                * (mCornerX - mMiddleX) / (mCornerY - mMiddleY);
 
        Log.i("hmg", "mTouchX  "   mTouch.x   "  mTouchY  "   mTouch.y);
        Log.i("hmg", "mBezierControl1.x  "   mBezierControl1.x
                  "  mBezierControl1.y  "   mBezierControl1.y);
        Log.i("hmg", "mBezierControl2.x  "   mBezierControl2.x
                  "  mBezierControl2.y  "   mBezierControl2.y);
 
        mBezierStart1.x = mBezierControl1.x - (mCornerX - mBezierControl1.x)
                / 2;
        mBezierStart1.y = mCornerY;
 
        // 当mBezierStart1.x < 0或者mBezierStart1.x > 480时
        // 如果继续翻页,会出现BUG故在此限制
        if (mBezierStart1.x < 0 || mBezierStart1.x > 480) {  
            if (mBezierStart1.x < 0)        
                mBezierStart1.x = mWidth - mBezierStart1.x;
 
            float f1 = Math.abs(mCornerX - mTouch.x);
            float f2 = mWidth * f1 / mBezierStart1.x;
            mTouch.x = Math.abs(mCornerX - f2);
 
            float f3 = Math.abs(mCornerX - mTouch.x)
                    * Math.abs(mCornerY - mTouch.y) / f1;
            mTouch.y = Math.abs(mCornerY - f3);
            mMiddleX = (mTouch.x   mCornerX) / 2;
            mMiddleY = (mTouch.y   mCornerY) / 2;
 
            mBezierControl1.x = mMiddleX - (mCornerY - mMiddleY)
                    * (mCornerY - mMiddleY) / (mCornerX - mMiddleX);
            mBezierControl1.y = mCornerY;
 
            mBezierControl2.x = mCornerX;
            mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX)
                    * (mCornerX - mMiddleX) / (mCornerY - mMiddleY);
            Log.i("hmg", "mTouchX --> "   mTouch.x   "  mTouchY-->  "
                      mTouch.y);
            Log.i("hmg", "mBezierControl1.x--  "   mBezierControl1.x
                      "  mBezierControl1.y -- "   mBezierControl1.y);
            Log.i("hmg", "mBezierControl2.x -- "   mBezierControl2.x
                      "  mBezierControl2.y -- "   mBezierControl2.y);
            mBezierStart1.x = mBezierControl1.x
                    - (mCornerX - mBezierControl1.x) / 2;
        }
 
        mBezierStart2.x = mCornerX;
        mBezierStart2.y = mBezierControl2.y - (mCornerY - mBezierControl2.y)
                / 2;
 
        mTouchToCornerDis = (float) Math.hypot((mTouch.x - mCornerX),
                (mTouch.y - mCornerY));
 
        mBezierEnd1 = getCross(mTouch, mBezierControl1, mBezierStart1,
                mBezierStart2);
        mBezierEnd2 = getCross(mTouch, mBezierControl2, mBezierStart1,
                mBezierStart2);
 
        Log.i("hmg", "mBezierEnd1.x  "   mBezierEnd1.x   "  mBezierEnd1.y  "
                  mBezierEnd1.y);
        Log.i("hmg", "mBezierEnd2.x  "   mBezierEnd2.x   "  mBezierEnd2.y  "
                  mBezierEnd2.y);
 
        /*
         * mBeziervertex1.x 推导
         * ((mBezierStart1.x mBezierEnd1.x)/2 mBezierControl1.x)/2 化简等价于
         * (mBezierStart1.x  2*mBezierControl1.x mBezierEnd1.x) / 4
         */
        mBeziervertex1.x = (mBezierStart1.x   2 * mBezierControl1.x   mBezierEnd1.x) / 4;
        mBeziervertex1.y = (2 * mBezierControl1.y   mBezierStart1.y   mBezierEnd1.y) / 4;
        mBeziervertex2.x = (mBezierStart2.x   2 * mBezierControl2.x   mBezierEnd2.x) / 4;
        mBeziervertex2.y = (2 * mBezierControl2.y   mBezierStart2.y   mBezierEnd2.y) / 4;
    }
 
    private void drawCurrentPageArea(Canvas canvas, Bitmap bitmap, Path path) {
        mPath0.reset();
        mPath0.moveTo(mBezierStart1.x, mBezierStart1.y);
        mPath0.quadTo(mBezierControl1.x, mBezierControl1.y, mBezierEnd1.x,
                mBezierEnd1.y);
        mPath0.lineTo(mTouch.x, mTouch.y);
        mPath0.lineTo(mBezierEnd2.x, mBezierEnd2.y);
        mPath0.quadTo(mBezierControl2.x, mBezierControl2.y, mBezierStart2.x,
                mBezierStart2.y);
        mPath0.lineTo(mCornerX, mCornerY);
        mPath0.close();
 
        canvas.save();
        canvas.clipPath(path, Region.Op.XOR);
        canvas.drawBitmap(bitmap, 0, 0, null);
        canvas.restore();
    }
 
    private void drawNextPageAreaAndShadow(Canvas canvas, Bitmap bitmap) {
        mPath1.reset();
        mPath1.moveTo(mBezierStart1.x, mBezierStart1.y);
        mPath1.lineTo(mBeziervertex1.x, mBeziervertex1.y);
        mPath1.lineTo(mBeziervertex2.x, mBeziervertex2.y);
        mPath1.lineTo(mBezierStart2.x, mBezierStart2.y);
        mPath1.lineTo(mCornerX, mCornerY);
        mPath1.close();
 
        mDegrees = (float) Math.toDegrees(Math.atan2(mBezierControl1.x
                - mCornerX, mBezierControl2.y - mCornerY));
        int leftx;
        int rightx;
        GradientDrawable mBackShadowDrawable;
        if (mIsRTandLB) {
            leftx = (int) (mBezierStart1.x);
            rightx = (int) (mBezierStart1.x   mTouchToCornerDis / 4);
            mBackShadowDrawable = mBackShadowDrawableLR;
        } else {
            leftx = (int) (mBezierStart1.x - mTouchToCornerDis / 4);
            rightx = (int) mBezierStart1.x;
            mBackShadowDrawable = mBackShadowDrawableRL;
        }
        canvas.save();
        canvas.clipPath(mPath0);
        canvas.clipPath(mPath1, Region.Op.INTERSECT);
        canvas.drawBitmap(bitmap, 0, 0, null);
        canvas.rotate(mDegrees, mBezierStart1.x, mBezierStart1.y);
        mBackShadowDrawable.setBounds(leftx, (int) mBezierStart1.y, rightx,
                (int) (mMaxLength   mBezierStart1.y));
        mBackShadowDrawable.draw(canvas);
        canvas.restore();
    }
 
    public void setBitmaps(Bitmap bm1, Bitmap bm2, Bitmap bm3) {
        mCurPageBitmap = bm1;
        mCurPageBackBitmap = bm2;
        mNextPageBitmap = bm3;
    }
 
    @Override
    protected void onDraw(Canvas canvas) {
        canvas.drawColor(0xFFAAAAAA);
        calcPoints();
        drawCurrentPageArea(mCanvas, mCurPageBitmap, mPath0);
        drawNextPageAreaAndShadow(mCanvas, mNextPageBitmap);
        drawCurrentPageShadow(mCanvas);
        drawCurrentBackArea(mCanvas, mCurPageBitmap);
        canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
    }
 
    /**
     * Author : hmg25 Version: 1.0 Description : 创建阴影的GradientDrawable
     */
    private void createDrawable() {
        int[] color = { 0x333333, 0xb0333333 };
        mFolderShadowDrawableRL = new GradientDrawable(
                GradientDrawable.Orientation.RIGHT_LEFT, color);
        mFolderShadowDrawableRL
                .setGradientType(GradientDrawable.LINEAR_GRADIENT);
 
        mFolderShadowDrawableLR = new GradientDrawable(
                GradientDrawable.Orientation.LEFT_RIGHT, color);
        mFolderShadowDrawableLR
                .setGradientType(GradientDrawable.LINEAR_GRADIENT);
 
        mBackShadowColors = new int[] { 0xff111111, 0x111111 };
        mBackShadowDrawableRL = new GradientDrawable(
                GradientDrawable.Orientation.RIGHT_LEFT, mBackShadowColors);
        mBackShadowDrawableRL.setGradientType(GradientDrawable.LINEAR_GRADIENT);
 
        mBackShadowDrawableLR = new GradientDrawable(
                GradientDrawable.Orientation.LEFT_RIGHT, mBackShadowColors);
        mBackShadowDrawableLR.setGradientType(GradientDrawable.LINEAR_GRADIENT);
 
        mFrontShadowColors = new int[] { 0x80111111, 0x111111 };
        mFrontShadowDrawableVLR = new GradientDrawable(
                GradientDrawable.Orientation.LEFT_RIGHT, mFrontShadowColors);
        mFrontShadowDrawableVLR
                .setGradientType(GradientDrawable.LINEAR_GRADIENT);
        mFrontShadowDrawableVRL = new GradientDrawable(
                GradientDrawable.Orientation.RIGHT_LEFT, mFrontShadowColors);
        mFrontShadowDrawableVRL
                .setGradientType(GradientDrawable.LINEAR_GRADIENT);
 
        mFrontShadowDrawableHTB = new GradientDrawable(
                GradientDrawable.Orientation.TOP_BOTTOM, mFrontShadowColors);
        mFrontShadowDrawableHTB
                .setGradientType(GradientDrawable.LINEAR_GRADIENT);
 
        mFrontShadowDrawableHBT = new GradientDrawable(
                GradientDrawable.Orientation.BOTTOM_TOP, mFrontShadowColors);
        mFrontShadowDrawableHBT
                .setGradientType(GradientDrawable.LINEAR_GRADIENT);
    }
 
    /**
     * Author : hmg25 Version: 1.0 Description : 绘制翻起页的阴影
     */
    public void drawCurrentPageShadow(Canvas canvas) {
        double degree;
        if (mIsRTandLB) {
            degree = Math.PI
                    / 4
                    - Math.atan2(mBezierControl1.y - mTouch.y, mTouch.x
                            - mBezierControl1.x);
        } else {
            degree = Math.PI
                    / 4
                    - Math.atan2(mTouch.y - mBezierControl1.y, mTouch.x
                            - mBezierControl1.x);
        }
        //翻起页阴影顶点与touch点的距离
        double d1 = (float) 25 * 1.414 * Math.cos(degree);
        double d2 = (float) 25 * 1.414 * Math.sin(degree);
        float x = (float) (mTouch.x   d1);
        float y;
        if (mIsRTandLB) {
            y = (float) (mTouch.y   d2);  
        } else {
            y = (float) (mTouch.y - d2);
        }
        mPath1.reset();
        mPath1.moveTo(x, y);
        mPath1.lineTo(mTouch.x, mTouch.y);
        mPath1.lineTo(mBezierControl1.x, mBezierControl1.y);
        mPath1.lineTo(mBezierStart1.x, mBezierStart1.y);
        mPath1.close();
        float rotateDegrees;
        canvas.save();
 
        canvas.clipPath(mPath0, Region.Op.XOR);
        canvas.clipPath(mPath1, Region.Op.INTERSECT);
        int leftx;
        int rightx;
        GradientDrawable mCurrentPageShadow;
        if (mIsRTandLB) {
            leftx = (int) (mBezierControl1.x);
            rightx = (int) mBezierControl1.x   25;
            mCurrentPageShadow = mFrontShadowDrawableVLR;
        } else {
            leftx = (int) (mBezierControl1.x - 25);
            rightx = (int) mBezierControl1.x   1;
            mCurrentPageShadow = mFrontShadowDrawableVRL;
        }
 
        rotateDegrees = (float) Math.toDegrees(Math.atan2(mTouch.x
                - mBezierControl1.x, mBezierControl1.y - mTouch.y));
        canvas.rotate(rotateDegrees, mBezierControl1.x, mBezierControl1.y);
        mCurrentPageShadow.setBounds(leftx,
                (int) (mBezierControl1.y - mMaxLength), rightx,
                (int) (mBezierControl1.y));
        mCurrentPageShadow.draw(canvas);
        canvas.restore();
 
        mPath1.reset();
        mPath1.moveTo(x, y);
        mPath1.lineTo(mTouch.x, mTouch.y);
        mPath1.lineTo(mBezierControl2.x, mBezierControl2.y);
        mPath1.lineTo(mBezierStart2.x, mBezierStart2.y);
        mPath1.close();
        canvas.save();
        canvas.clipPath(mPath0, Region.Op.XOR);
        canvas.clipPath(mPath1, Region.Op.INTERSECT);
        if (mIsRTandLB) {
            leftx = (int) (mBezierControl2.y);
            rightx = (int) (mBezierControl2.y   25);
            mCurrentPageShadow = mFrontShadowDrawableHTB;
        } else {
            leftx = (int) (mBezierControl2.y - 25);
            rightx = (int) (mBezierControl2.y   1);
            mCurrentPageShadow = mFrontShadowDrawableHBT;
        }
        rotateDegrees = (float) Math.toDegrees(Math.atan2(mBezierControl2.y
                - mTouch.y, mBezierControl2.x - mTouch.x));
        canvas.rotate(rotateDegrees, mBezierControl2.x, mBezierControl2.y);
        float temp;
        if (mBezierControl2.y < 0)
            temp = mBezierControl2.y - 800;
        else
            temp = mBezierControl2.y;
 
        int hmg = (int) Math.hypot(mBezierControl2.x, temp);
        if (hmg > mMaxLength)
            mCurrentPageShadow
                    .setBounds((int) (mBezierControl2.x - 25) - hmg, leftx,
                            (int) (mBezierControl2.x   mMaxLength) - hmg,
                            rightx);
        else
            mCurrentPageShadow.setBounds(
                    (int) (mBezierControl2.x - mMaxLength), leftx,
                    (int) (mBezierControl2.x), rightx);
 
        Log.i("hmg", "mBezierControl2.x   "   mBezierControl2.x
                  "  mBezierControl2.y  "   mBezierControl2.y);
        mCurrentPageShadow.draw(canvas);
        canvas.restore();
    }
 
    /**
     * Author : hmg25 Version: 1.0 Description : 绘制翻起页背面
     */
    private void drawCurrentBackArea(Canvas canvas, Bitmap bitmap) {
        int i = (int) (mBezierStart1.x   mBezierControl1.x) / 2;
        float f1 = Math.abs(i - mBezierControl1.x);
        int i1 = (int) (mBezierStart2.y   mBezierControl2.y) / 2;
        float f2 = Math.abs(i1 - mBezierControl2.y);
        float f3 = Math.min(f1, f2);
        mPath1.reset();
        mPath1.moveTo(mBeziervertex2.x, mBeziervertex2.y);
        mPath1.lineTo(mBeziervertex1.x, mBeziervertex1.y);
        mPath1.lineTo(mBezierEnd1.x, mBezierEnd1.y);
        mPath1.lineTo(mTouch.x, mTouch.y);
        mPath1.lineTo(mBezierEnd2.x, mBezierEnd2.y);
        mPath1.close();
        GradientDrawable mFolderShadowDrawable;
        int left;
        int right;
        if (mIsRTandLB) {
            left = (int) (mBezierStart1.x - 1);
            right = (int) (mBezierStart1.x   f3   1);
            mFolderShadowDrawable = mFolderShadowDrawableLR;
        } else {
            left= (int) (mBezierStart1.x - f3 - 1);
            right= (int) (mBezierStart1.x   1);
            mFolderShadowDrawable = mFolderShadowDrawableRL;
        }
        canvas.save();
        canvas.clipPath(mPath0);
        canvas.clipPath(mPath1, Region.Op.INTERSECT);
 
        mPaint.setColorFilter(mColorMatrixFilter);
 
        float dis = (float) Math.hypot(mCornerX - mBezierControl1.x,
                mBezierControl2.y - mCornerY);
        float f8 = (mCornerX - mBezierControl1.x) / dis;
        float f9 = (mBezierControl2.y - mCornerY) / dis;
        mMatrixArray[0] = 1 - 2 * f9 * f9;
        mMatrixArray[1] = 2 * f8 * f9;
        mMatrixArray[3] = mMatrixArray[1];
        mMatrixArray[4] = 1 - 2 * f8 * f8;
        mMatrix.reset();
        mMatrix.setValues(mMatrixArray);
        mMatrix.preTranslate(-mBezierControl1.x, -mBezierControl1.y);
        mMatrix.postTranslate(mBezierControl1.x, mBezierControl1.y);
        canvas.drawBitmap(bitmap, mMatrix, mPaint);
        // canvas.drawBitmap(bitmap, mMatrix, null);
        mPaint.setColorFilter(null);
        canvas.rotate(mDegrees, mBezierStart1.x, mBezierStart1.y);
        mFolderShadowDrawable.setBounds(left, (int) mBezierStart1.y, right,
                (int) (mBezierStart1.y   mMaxLength));
        mFolderShadowDrawable.draw(canvas);
        canvas.restore();
    }
 
}

标签: Android 翻页

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